DXbase includes a set of internal databases that contain all the validation information about such things as IOTAs, Zones, Country Prefixes, US States and Counties, Satellite names, etc.  These databases are all on line and easily updated by you.  So, you never have to wait for us to add a new country or IOTA.  And, you don't have to pay for an upgrade to get updated databases.  Just update it whenever you need to.  The prefix database is very special because it's power gives you the most accurate automatic identification of country info based on just a callsign than any other logging software out there.  DXbase lets you map a full callsign to its country prefix and it lets you map callsign prefixes to the "real" country.  These powerful tools insure that DXbase can get it right when other programs fail.